How Facebook determines ad placement in news feeds: > Millions of auctions take place every minute as users across Facebook load their feeds. ... The algorithm is constantly learning, using past results to inform how it weighs bids in the next auction. The intent, Facebook says, is to maximize value for everybody: to pair the advertiser with its likeliest customers, and to show ads that users want to see . And, of co…
And yet, advertisers still have no meaningful ROI, because it's never in the platform's interest to overachieve on this count. And, users are still very much annoyed by distracting, irrelevant, or overly-targeted ads.
So they're really pairing the ads with people who are least likely to complain. That kind of shifts how I view the incentives.